Hebrews 8:6 (NKJV)
One thing that I really do not like is when some product claims to be new and improved, but it is really only slightly changed. It may be that the outside of the package, the logo, or some color scheme is different, but nothing of substance or value is better than it was before. Sometimes I have seen things that say that they were updated, in my phone, tablet, or computer, but nothing is really new, improved, or better in any way. To really be new and improved, something would also need to be better.
The Bible contains the Old and the New Testaments. Another word for testament is covenant, or even contract. Today, we have a new testament, a new contract with God that is better than the old. What is better about this new covenant with God? Because of our new, improved, and better covenant, we can have a personal relationship with God; He is our Father and we are His children, our sins are not just covered, they are washed away, and we have the Greater One, the Holy Spirit, who is our Helper, living in us.
So many Christians live a life far below what God intends them to have, because they do not understand their position with God as a part of the new and better covenant that came through Jesus Christ. God's Word tells us about this new, improved, and better covenant with God, so we need to go to the Bible to learn what belongs to us, and allow the Holy Spirit to help us see how to live as a new covenant Christian. We need to know about, and live in the reality of our new, improved, and better, covenant with God.